Luis Zambrano-Cruzatty, Ph.D.
Spring 2025
Objectives covered in this lecture
After this lecture we will able to:
There are three important limits:
Note:
You will perform tests to determine this limits in your laboratory practice. You will have fun!
| Test No | Wet soil + container | Dry soil + container | Container | N |
| 1 | 17.71 | 15.27 | 5.23 | 32 |
| 2 | 20.08 | 16.78 | 5.21 | 30 |
| 3 | 24.31 | 19.25 | 5.1 | 28 |
| 4 | 16.45 | 13.2 | 5.11 | 26 |
| 5 | 18.35 | 14.23 | 5.13 | 23 |
| 6 | 26.80 | 19.45 | 5.11 | 21 |
| Test No | Wet soil + container | Dry soil + container | Container |
| 1 | 17.34 | 16.2 | 5.11 |
| 2 | 18.07 | 16.79 | 5.13 |
| 3 | 15.20 | 14.25 | 5.14 |
| 4 | 16.66 | 15.46 | 5.11 |
During the determination of the shrinkage limit of a sandy clay, the following laboratory data was obtained:
Volumetric determination of soil pat:
calculate the \(SL\) assuming \(G_s=2.65\).
| Mineral | Activity |
| Na-montmorillonite | 4-7 |
| Ca-montmorillonite | 1.5 |
| Illite | 0.5-1.3 |
| Kaolinite | 0.3-0.5 |
| Hallosyte (dehydrated) | 0.5 |
| Hallosyte (hydrated) | 0.1 |
| Attapulgite | 0.5-1.2 |
| Allophane | 0.5-1.2 |
| Mica (muscovite) | 0.2 |
| Calcite | 0.2 |
| Quartz | 0 |
For the parameters shown in the table, compute \(LL\), \(PI\), \(LI\), and \(A\)
Data: \(G_F=0\%\), \(F_F= 30\%\), \(C_c=5.6\), \(C_u=24.1\), non-plastic